Hypodermic syringe



J. E. JAROS HYPODERMIC sYRINGE June 22., 1926.

Fiied Feb. 27,

1925 2 Sheets-Sheet June 22 '1926.

' 1,589,969 J. E. JAROS HYPODERMIG SYINGE 'Filed Feb. 27, 1925 2 sheets-sheet 2 Patented .lune 22; 1925.

UNITE@ Spill@ JOSEPH E. JAROS, F CHICAGO, ILLINOS.

HYPODERMIC SYRINGE.

Application filed February 27, 1925.

My invention pertains to a hypoderinic syringe, and one which is especially suitable for use by dentists. The main object of this invention is to provide a durable, simple and etlicient construction of this hind; and an other object is to provide a syringe in which the needle is hired or integral with the end of the barrel, preferably by fusing the glass of the barrel end around a needle consisting of material having a high point of fusie-n.

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specification; and in which,

Fig. 1 is a longitudinal section of the syringe barrel with cap means and a conipound corlr mounted thereon to close the barrel, as when filled;

F ig. 2 is a horizontal sectional View talrcn on line 2 2 of Fig. 1;

Fig. 3 is an elevation of the complete syringe, ready for use, and partly shown in section;

Fig. 4 is a longitudinal section of the barrel, closed simply by means of an inner cork;

Fig. 5 is a longitudinal section of a slightly modified form of cap means and plunger; and

Fig. 6 is an elevational view of the moditied form of syringe.

The form of invention illustrated in Figs. 1, 2 and 3 comprises a glass barrel or tubular member 10 having a rim 11 at its upper open end 12 and having .a solid integral portion 13 at the lower end with a hollow needle 14 tixedly mounted therein, and preferably by fusing the glass of the solid portion 13 around said needle, so that the channel 15 in the needle extends from the chamber 16 in the barrel and beyond the exterior of the portion 13. rThe needle 14 is made from material having a high point of fusion7 and preferably of iridio-platinum.

Closure means is provided for the upper end of the barrel, and this means preferably includes cap means and a compound corlr mounted therein. The cap means preferably comprises a cap 17 mounted over the tube, and a sleeve 18 mounted around the tube and having linger' lugs 19 extending therefrom. The upper end 20 of the sleeve is threaded to engage in the lower threaded portion of Serial No. 11.908.

cap 1T; and bears under rim 11 of the barrel. rlhe compound cork includes a sleeve 21 which is mounted in the cap and is seated ben ath the ltop of the cap and upon the rim 11 of the barrel, thus forming cushion- Iing means between the cap and barrel; and this cork further includes a core 22 within sleeve 217 which core is of an exact size to move into and lit closely inthe barrel 10.

plunger means is provided and comprises a stem 23 engageable through an opening 24 in the top of cap 1?', and a nut 25 removably mounted on its inner end to prevent accidental withdrawal of the plungerl from said cap during operation. rlhis plunger has a head or hand piece 26 on its upper end and curved lugs 27 and 28 thereon as shown. This plunger is adapted to inove the core 22 of the cork into the chamber 16 within barrel 10; as indicated in Fig. 3 of the draw ings, to force the .solution through the channel 15 in needle 14, as is well understood.

Figs. 4, 5 and 6 illustrate a slightly modified form of closure means, however, the glass barrel 10 is identical Vith that in the preceding form and is provided with the` rim 11 at the upper end, and the closed integral portion 13 at the .lower end in which the hollow needle 14 is fixedly mounted7 as indicated in Fig. 4, but in this forni the inner core 22 of the cork is used alone to forni the sealing means or closure means for the barrel, for shipping the solution in said barrel and for retaining the saine. In this form, however, the cap 17 is slight-ly modified and is preferably provided with a shoulder portion 1 which directly engages or rests upon the glass rim 11'; as shown in Fig. 6, thus doing` away with the use of the sleeve portion of the cork, shown in the preceding form. A sleeve 18 with finger lugs 19 is also provided and has its upper portion 20 threaded for engagement with the threads in cap 17', said portion 20 engaging beneath rim 11'; and being preferably identical in all respects with the sleeve means shown in the preceding form. The plunger 23 with its removal nut 25 and head or hand engaged portion 26 is also the same as in the preceding form.

rllhe form shown in Figs. 4, 5 and 6 is more economical than the preceding form, since the barrel 10 with the cork portion 22 alone need be transmitted in refilling the barrel and in delivering it to the dentist or user; whereas in the form shown in Figs.

CII

1, 2 and 3 it has been customary to transmit the cap 17 and sleeve 18 along with the cori 2l, 22, mounted upon the barrel, as shown in Fig. 1, when the barrel is being transmitted for refilling and when it is delivered filled to the dentist or user; whereas the sleeve 2l of the cork acts as a cushioning means between the cap 1T and rim il, while in the form shown in Fig. 6 the cap bears directly on the rim l1.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. l, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail'myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention, what claim as new and desire to secure by Letters Patent is:

l. A syringe comprising a barrel with cap means mounted thereon, and a compound cork includiirg` a sleeve mounted in said cap means to engage the end of said barrel and a core in the sleeve movable into the barrel.

2. A syringe comprising a barrel, cap means with a plunger mounted on said 'oarrel, and a cork including a sleeve seated between said can means and the end of said barrel and a core in said sleeve movable by said plunger into said barrel.

3. A syringe comprising a barrel with an upper rim, cap' mounted on said rim, a sleeve mounted beneath said rim and rcmovably fastened to said cap to hold it on the barrel, and a cork mounted in said cap and including a sleeve portion seated against said rim and a core portion movable into said barrel.

4. A syringe comprising` a barrel with a rim, a cap mounted over said rim, a sleeve mounted on said barrel beneath said rim and removably fastened to said cap to hold it on the barrel, a cork including a central core and a sleeve portion around the same which is seated in said cap against said rim, and a plunger mounted in said cap to move there-A in and force said core into said barrel.

5. A syringe comprising a glass barrel with an integral upper rim and a solid integral lower end, a hollow needle fixed in said end by fusing the glass thereof around said needle, a sleeve with finger engaging means mounted on said barrel to engage said rim, a cap mounted over said rim and threaded to said sleeve, a cork with a core and a sleeve thereon which is seated in said cap and against said rim, and a plunger mounted to move in said cap and having means to prevent withdrawal therefrom for moving said core into said barrel.

in testimony whereof I have signed my name to this specification.

JOSEPH E. JABOS. 

